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Howard Tenens Logistics Food Waste-bioQUBE Digesters With 7.5kW CHP &Biomethane UpgradeDeveloped by QUBE Renewables Ltd, the bioQUBE is a robust anaerobic digestion technology providing a mobile, compact solution to annually process between between 500 and 950 metric tonnes of organic feedstocks.Each bioQUBE module comprises a 20 foot shipping container with differing numbers of modules making up the system configuration.

Rapid Start-UpThe units are highly mobile and quick to deploy in many different situations. The two bioQUBE units, ancillaries, connections, and CHP engine were pre-fabricated and configured in the factory so installation was swift and easy once delivered to the site.The bioQUBE units at Howard Tenens were producing biogas in small quantities in only a matter of days after the feed stock was introduced. The site at Howard Tenens is a clean industrial site with many other buildings, offices and housing within the local area. There have been no issues of odour or noise since the plant has been running.

The Highlights

• Two bioQUBE digester modules with a 7.5 kW CHP and bio-methane upgrader

• Yielding 92m3 of biogas per tonne of foodwaste• Produces 44,683 kWh / yr of electricity• Produces 60,532 kWh/yr of heat• Benefit of powering their delivery vehicles with

biogas produced from the waste they collect• Carbon savings of 43,955kg C02e annually

Resource RecoveryLocated at Howard Tenens Andover logistics hub, the two bioQUBE units were installed in September 2013 to utilize various food waste streams including out of date and miss-labelled stock – from gingerbread and baby food to coffee grounds and flavoured sugar syrup. The food waste is processed in two bioQUBEs with 36m3 of digestion volume. The resultant biogas is utilized in a 7.5kW CHP which is linked to the site. Or the biogas is upgraded to a vehicle fuel.

CASE STUDY

The bioQUBE unit is very efficient, particularly when recovering heat from the exhaust and engine of the powerQUBE CHP - up to 30% of the output is electricity and 52% heat in the form of hot water at 60 to 80 degrees Celsius.

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Remote Monitoring & ControlThe bioQUBE needs some daily maintenance and has to be “fed” daily. We have likened it to looking after a mechanical cow. However, the bioQUBEs have an intuitive user interface with all of the variables being controlled by a touch screen unit.

This data can be linked to an app on a mobile phone which makes remotely controlling and monitoring the unit simple.A robust data capture and reporting system allows for remote diagnostics to support daily operations and regular maintenance routines.

Robust DesignThe bioQUBEs at Howard Tenens have an automated feed system with maceration at the front end. The feedstock is de-packaged and then loaded into the reception hopper once a day. The hopper is fully automated, equipped with weigh-cells, and can measure the feedstock viscosity.Pre-set parameters allow the reception hopper to automatically add the required amount of water or recirculate the liquid fraction of the digestate, macerate the feedstock and feed the digester continuously until the next batch is delivered.

Transportation FuelThe system also comprises a gas mixing pod and a biogas storage bladder on the roof of one of the bioQUBEs, control panel, digestate store, and 7.5 kWCHP. This system also has a biogas upgrader enabling the biogas to be cleaned to 97% methane and compressed to 300 bar for use as a vehicle fuel.

This allows Howard Tenens to either run the CHP or use the biomethane upgrader depending on gas volumes and their needs. Two Mercedes Sprinter vans used to make deliveries and pickup food waste are fuelled using the biomethane.

390 Davis Drive, Newmarket, Ontario, Canada L3Y 7T8

CASE STUDY

CCIQR-HowardTCS-CAN 5/16